Reservoir characterization and rock typing

Reservoir rock typing is done in order to two main goals:

1- Sample selection for SCAL

There are two series of petrophysical analyses in core analysis procedure which are named Routine and Special analyses (RCAL and SCAL). Regarding the importance and high cost of SCAL, all RCAL samples must be screened before the SCAL procedure and the best and perfect samples should be candidate. On the other hand, rock typing and grouping of analyzed sample during RCAL stage and geology study, is a method which led to the best and high performance candidates for SCAL. Based on available data, there are several methods that could be used to rock typing. However, an accurate integration of geological and petrophysical results lead to the identification of the best rock types for SCAL.

 

2- Reservoir characterization and zonation

A combination engineering data such as core porosity and permeability and geological data can lead to rock types and reservoir zones which can be used to further field development and exploration programs and modellings.

  • Petrographical rock types
  • K-Phi cross plot rock types
  • Lucia’s petrophysical classes
  • Winland’s pore size classes
  • Hydraulic Flow Units
  • Reservoir Zoning using Lorenz Plot
  • Electrofacies and log typing
  • Correlation of all results
  • Integration of petrophysical rock types and geological results
  • Sample selection for SCAL
  • Insertion of rock type in sequence stratigraphic framework and models
  • Adding the dynamic data into the rock types